Nominal diameter 380 mm (15.0 in) Nominal impedance 8 Ω Minimum impedance 6.5 Ω Nominal power handling 1500 W Continuous power handling 3000 W Sensitivity (1W/1m) 95.0 dB Frequency range 40 — 1500 Hz Voice coil diameter 100 mm (4.0 in) Winding material Copper Former material Glass Fibre Winding depth 32 mm (1.26 in) Magnetic gap depth 16 mm (0.63 in) Flux density 1.15 T Design Surround shape Triple Roll Cone shape Radial Magnet material Neodymium Inside Slug Spider Double Silicone Pole design T-Pole Woofer cone treatment TWP Waterproof Both Sides Recommended enclosure 120.0 dm3 (4.24 ft3) Recommended tuning 35 Hz Parameters Fs 37 Hz Re 5.4 Ω Qes 0.34 Qms 4.8 Qts 0.31 Vas 110.0 dm3 (3.9 ft3) Sd 855.0 cm2 (132.5 in2) η₀ 1.6 % Xmax 12.5 mm Xvar 13.0 mm Mms 176 g Bl 25.6 Txm Le 2.2 mH EBP 108 Hz Mounting And Shipping Info Overall diameter 393 mm (15.5 in) Bolt circle diameter 374 mm (16.7 in) Baffle cutout diameter 353.0 mm (13.9 in) Depth 190 mm (7.5 in) Flange and gasket thickness 16 mm (0.63 in) Air volume occupied by driver 6.0 dm3 (0.21 ft3) Net weight 9.5 kg (21.0 lb) Shipping units 1 Shipping weight 10.9 kg (24.0 lb) Shipping box 420x420x200 mm (16.5×16.5×7.9 in)